The musical scale we use today was standardized at A = 440 Hz only in 1939 — different standards were common before then.
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Particles can exist in multiple states until observed.
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The Roman festival of Saturnalia — involving gift-giving, feasting, and role reversals — influenced Christmas traditions.
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Carthage was destroyed by Rome in 146 BCE.
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Tug of war was in the Olympics from 1900 to 1920.
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Project Blue Book investigated reports of unidentified flying objects.
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Particles can exist in multiple states until observed.
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Competitive swimming only standardized pool lengths to 50 meters for the Olympics in 1924.
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